固化粉土底基层力学特性分析
发布时间：2018-11-18 19:20
【摘要】：选择石灰+粉煤灰、石灰+粉煤灰+水泥、石灰+水泥、SEU-2型固化剂4种外掺剂,对粉土进行固化以作为公路底基层。使用BISAR程序建立路面结构的计算模型,计算在车辆荷载作用下固化粉土底基层的拉应力和拉应变,通过弯拉应力验算,检验固化粉土底基层的抗拉强度是否满足要求,并且比较4种外掺剂的固化效果。研究结果表明,底基层的厚度和抗压回弹模量对底基层的力学特性有较大影响,固化粉土底基层结构的优化参数为厚度15cm,抗压回弹模量1 100MPa;固化粉土底基层的抗拉强度满足设计要求,且SEU-2型固化剂的固化效果优于其他3种外掺剂。
[Abstract]:Lime fly ash, lime fly ash cement, lime cement and SEU-2 curing agent were selected to solidify silt as the base of highway base. The calculation model of pavement structure is established by using BISAR program, and the tensile stress and strain of solidified silt base under vehicle load are calculated. By checking the bending tensile stress, the tensile strength of solidified silt base is checked to see if the tensile strength meets the requirements. The curing effects of four kinds of admixtures were compared. The results show that the thickness and modulus of compressive resilience of the base have great influence on the mechanical properties of the base. The optimum parameters of the base structure of solidified silt are 15cm thick and 1100MPa of modulus of resilience. The tensile strength of solidified silt base can meet the design requirements, and the curing effect of SEU-2 curing agent is better than that of the other three kinds of admixtures.
【作者单位】： 东南大学岩土工程研究所;
【基金】：国家自然科学基金项目(40872173) 江苏交通科技项目(2010Y36-3)
【分类号】：U416.2
本文编号：2340944
[Abstract]:Lime fly ash, lime fly ash cement, lime cement and SEU-2 curing agent were selected to solidify silt as the base of highway base. The calculation model of pavement structure is established by using BISAR program, and the tensile stress and strain of solidified silt base under vehicle load are calculated. By checking the bending tensile stress, the tensile strength of solidified silt base is checked to see if the tensile strength meets the requirements. The curing effects of four kinds of admixtures were compared. The results show that the thickness and modulus of compressive resilience of the base have great influence on the mechanical properties of the base. The optimum parameters of the base structure of solidified silt are 15cm thick and 1100MPa of modulus of resilience. The tensile strength of solidified silt base can meet the design requirements, and the curing effect of SEU-2 curing agent is better than that of the other three kinds of admixtures.
【作者单位】： 东南大学岩土工程研究所;
【基金】：国家自然科学基金项目(40872173) 江苏交通科技项目(2010Y36-3)
【分类号】：U416.2
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